smbd: Make upper layer decide when to destroy the transport

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On transport recoonect, upper layer CIFS code destroys the current
transport and then recoonect. This code path is not used by SMBD, in that
SMBD destroys its transport on RDMA disconnect notification independent of
CIFS upper layer behavior.

This approach adds some costs to SMBD layer to handle transport shutdown
and restart, and to deal with several racing conditions on reconnecting
transport.

Re-work this code path by introducing a new smbd_destroy. This function is
called form upper layer to ask SMBD to destroy the transport. SMBD will no
longer need to destroy the transport by itself while worrying about data
transfer is in progress. The upper layer guarantees the transport is
locked.

change log:
v2: fix build errors when CONFIG_CIFS_SMB_DIRECT is not configured

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

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This commit is contained in:

Long Li 2019-04-04 11:35:42 -05:00 • committed by Steve French

parent 973189aba6

commit 050b8c3740

3 changed files with 101 additions and 27 deletions

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9

fs/cifs/connect.c

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114

fs/cifs/smbdirect.c

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5

fs/cifs/smbdirect.h

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